ISRC DEF056400311
Verified recording
DEF056400311 is “Piano Sonata No. 26 in E-Flat Major, Op. 81a "Les Adieux": I. Das Lebewohl (Adagio - Allegro)” by Ludwig van Beethoven,
registered on the CopyrightChains blockchain with CopyrightID
0x7c50163ebb5594127c2394f524239a4b371dda10d6f030b784511762489af422 and independently timestamped
in Bitcoin block 960397 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400311.
Recording identifiers
- ISRC
- DEF056400311
- Title
- Piano Sonata No. 26 in E-Flat Major, Op. 81a "Les Adieux": I. Das Lebewohl (Adagio - Allegro)
- Artist
- Ludwig van Beethoven
- CopyrightID (CopyrightChains transaction hash)
0x7c50163ebb5594127c2394f524239a4b371dda10d6f030b784511762489af422
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T12:24:41+00:00
- Bitcoin block
- 960397
- Canonical record hash
sha256:1e83796e16ab2623b8270b3bdbd9d19410e530e893eb198834873865b6bb00e6- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056400311
- Bitcoin block existence check
- https://blockstream.info/api/block/960397
Full record
Track page: Piano Sonata No. 26 in E-Flat Major, Op. 81a "Les Adieux": I. Das Lebewohl (Adagio - Allegro) · Machine-readable JSON-LD